headsmp.S

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright 2011 Freescale Semiconductor, Inc.
 * Copyright 2011 Linaro Ltd.
 */

#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/assembler.h>

.arch armv7-a

diag_reg_offset:
	.word	g_diag_reg - .

	.macro	set_diag_reg
	adr	r0, diag_reg_offset
	ldr	r1, [r0]
	add	r1, r1, r0		@ r1 = physical &g_diag_reg
	ldr	r0, [r1]
	mcr	p15, 0, r0, c15, c0, 1	@ write diagnostic register
	.endm

ENTRY(v7_secondary_startup)
ARM_BE8(setend be)			@ go BE8 if entered LE
	mrc	p15, 0, r0, c0, c0, 0
	lsl	r0, r0, #16
	lsr	r0, r0, #20
	/* 0xc07 is cortex A7's ID */
	mov	r1, #0xc00
	orr	r1, #0x7
	cmp	r0, r1
	beq	secondary_startup

	set_diag_reg
	b	secondary_startup
ENDPROC(v7_secondary_startup)